Chuck



Patented Oct. i 9, 1928.

UNITED sTYA T s ATENT OFFICE.-

" AR HUR n. CURRIER, or new" IPSWICH, ,NEw 'HAMPsHiRE.

CHUCK.

Application filed March 30, 1 3271. SerialNo. 179,459.

'My'present invention is a novel and improved chuck, primarily intended for use as a saw holding chuck in machines.

An important vention is the provision of a chuck to. hold a saw or other cuttingror holding instrumental- 1 which chuck will be substantially auto-i ity,

matic in its release, as'well as in the holding and engaging actions. lVith the provision of such a chuck, theremoval and replacements of the cutting saws or other devices held by the chuck, is greatly facilitated, therebyrin creasing the efficiency of the particular machine in which the chuck is to be utilized. To achieve these desirable results, I preferably form the removable chuck spun and the recess or socket in thespindle to which said spun is applied, of non-wedging taper. construction. ith' such construction, regardless of how firmly the chuck spool or spun may be seated in the spindle, jamming or wedging of the two parts will be'impossible, and upon release of the varlous locking inr strumentalities, the spool will automatically disengage from the socket or recess in-the spindle droppinginto the operatorsv'hand. In this manner quick removal and lieve that such novel non-wedging taper construction in the co-acting faces of the spindle and spun, is new, and I have therefore claimed the same herein broadly.

I believe that such an automatic chuck-is novel, and I have therefore claimed the same I herein broadly.

The chuck illustrated herein'is particularly adapted for use in button blank cutting-ma- "chines, wherein'the steps of operation are "quick, and follow each other in rapid succession, thus requiring a chuck which will be positive in action, sturdy and compact in construction an-dcapable of facilitating removal and replacement of the cutting dev cescarried thereby.

The form of chuck illustrated inthepresent applicationfirmly, securely, and rigidly fholds the chuck spool in position, against vertical or lateral movement, and has a nun imum number ofmoving parts, thus greatly reducing wear, The spool of the chuck, which carries the cutting instrumentalities, :while .thus firmly and securelyheld' in position, is

nevertheless automatically and instantly re-' moved from the spindle by extremely simple mechanism. I ibutton blank cutting feature of my present in-- ready re-' placement of the spool are facilitated. I lie-'- si'de of the spindle 30,. openings or recesses 45.

I the chuck shown herein the spool be, applied tofthe spindle while the spindle s rotating, and the spoolwill automatically find its own seat in the spindle. 'This ability to insert the spool in thespindle while the chuck spindle is rotating, is a-veryimportant step, andon'e which adds greatly to theefficiency of themachine.

g Furtherfeatures of the invention, novel comblnations of parts'and advantages, will be hereinafter more fully pointed out and ing, locking, and drivingmembers.

a My vnovel chuck is clearly illustrated in ,Figs. lto 5 of the'present drawings, wherein TI utilize the spindle-3O and spool or chuck.

SPUHBLT 'Thelower portion of the spindle is indented or cut away, as shown at 32, to

- receivea sliding ring 33, having an inner an- ;nulargrooveor recess 34 and an outerrecess 35 adapted to receive oneend of a coiled sectional View onthe line spring 36. A lower ring 37 is'secured to the spindle- 30 bya driving fit, and has anannular groove 38 to receive the opposite-end of said spring 36. The spindlev 30 is formed hollow to permit the-passage thcrethrough of any suitable devices, suchas the holding dev1ces39, and 1s provided-with abevelerl face 40at its loweriuterior portion, adapted to cooperate with thebeyelled face 41 of the spool 31. The spool or chuck spun 31 has a depe'nding shank 42, formed hollow and bevelled on its interior to receive a cutting or working: tool, such as'asaw 43. These saws are preferably formed ofsplit spring metal in orderto secure a tight friction ,fit within the shank l2 andv spool'31,while still permitting said saws to be driven out from the shank and spooland new ones replaced, A pair of inclined recesses 44areprov1ded, one on each ing, locking, and driving members 46, clearly and having central Suitable sp 1h 1d illustrated in" Fig. 5, are provided,.one for Y ach ofthe recesses .44, and so constructed and arranged that the inner surface 47 of said member will extend into the slots of apertures 45. On the spool 31 I form a pair of spiral grooves or paths 48, gradually diminishing in size from the lowermost points to the upper ends of the grooves. The bottom surfaces of these grooves 48 on the tapered or bevelled face 41 of the spool 31 are at decreasing diameters from the axis of the spool 31. The lower ends of the grooves being at greater distances fromv the axis. As shown in Fig. 1 the members 46 are adapted, when in operating position, to ride in said grooves, until thebevelled face41 of the spool 31 is firmly seated against the bevelled face of the chuck 30, whereupon the spool 31 will be held, locked, and driven, by these members 46.

WVhen it is desired to remove the spool 31 for any purpose, such as the removal and replacement of the saw 43 or other cutting or operating instrumentalities, the spindle 30 is raised, by any suitable means, such for example as shown and described in my prior and co -pending application Serial No. 140,- 371. Thespindle 30 passes through a suit able bearing 49, in an arm or bracket 50, until the ring 33 comes in contact with the stops 51, 51, adjustably held in said arm or bracket and secured in adjusted position by set screws or the like 52. on contact of the ring 33 with the stops 51, the ring 33 will be forced downwardly compressing the spring 36, and

bringing the annular groove 34 into aline-' ment with the recesses 44%, whereupon the weight and centrifugal force due tothe speed of rotation of the spool 31, the shank 42 and component parts will force the driving and locking members 46 into the annular groove 34, whereupon the chuck spun or spool 31 will automatically drop of its own weight, into the hand of the operator.

l A spring cover or dust cap 53 is provided, fitted on the ring 33 and adapted to clear and slide over the lower ring 37. This dust'cap or ring 53 prevents the entrance of dirt, dust or like foreign substances into the working parts of the chuck.

When desired to replace the chuck spun in the bevelled portion of the spindle 30, the

ring 33 is released from the stops 51, permitting the coiled sprlng to expand and forcing the locking members, by means of the lower ed e 55 into the osition shown in Fin. 1. b

Thereupon the operator merely grasps the shank 4-2, inserts the spool 31 in thelower open end of the spindle 30, and the spiral grooves or paths 6L8 will engage the inner surfaces 47 of the locking members 46, being "caused to ride upwardly thereon until the chuck spool is firmly'seated in the spindle 30, whereupon these members 16 will act as locking, holding, and driving members to drive the spool'31 with the spindle 30.

An important advantage of the present form of chuck is the fact that the entire opering bevelled faces of the spool and spindle,

viz, 40 and ll in Fig. 1, are formedwith a non-wedging taper construction, so that the spool may ride intothe recess in the spindle until said co-acting faces meet in a firm seat, and yet, upon disengagement of the locking and driving instrumentalities, the non-wedging taper construction will permit the spool to be instantly released from engagement with the spindle, and automatically drop therefrom. Such construction results in a chuck, the advantages of which will be instantly apparent, in that the spool cannot jam in the spindle, the non-wedging taper construction providing for instant disengagement of the spool from the spindle recess upon release of the locking and holding devices. Such con struction also, permitting as it does quick removal, and facilitating the replacement of the spool, greatly adds to the efficiency of my novel chuck, regardless of the machine to which it is applied.

It will also be appreciated that the'chuck described and illustrated herein may -.be utilized inhorizontal operating position with equal facility and efficiency as in the vertical position herein illustrated, such veritcal position being for illustrative purposes only. This ability of the chuckto operate in any position, greatly broadens the field of utility thereof, enabling it to be embodied in many different machines 7 It will be appreciated that while I haveillustrated my novel chuck here-in constructed and arranged for use in a button bla-nk'cutting machine of the type illustrated in my prior and co-pending application, I amnot limited thereto, but my nove'l'chuck may be utilized in any .form of 7 machine wherein quickly attached, automatically removable and positively acting'chuckso-f this type are-1 desired. It will also be appreciated that I may vary the size, shape, and arrangement of parts, within-reasonably wide limits, without departing from the spirit of the in'vention.

1. A chuck comprising-a rotatable spindle having a tapered opening therein, atapered My invention is furtherdescribed and dei fined in the form of claims as follows:

tool holding spool adapted to enter said ta I;

pered opening, spiralgrooves in saidls pfool,

- arcuate holding, locking and driving members in said spindle, to cooperatewith and engage sa1d spiral grooves, and means ito permit radial disengagement ofsaid members from 1,686,601 r v a V '3 A chuck, comprising a rotating spindle having inclined recesses therein, holding,"

locking, driving members in said inclined recesses, a tool holding spool, spiral grooves in said spool, a relatively movable ring around said spindle, a groove in said ring to accommodate one portion of a coiled spring, a second ring of less diameter than said first ring affixed to said spindle and having 1 a groove to accommodate the other end of said spring, a spring cover and dust ring afiixed to said movable ring, and outside of said fixed ring, said movable ring, having a groove'on the inner side thereof, said spring being compressible to bring said inner'groove in the movable ring into alinement with the said inclined recesses in the spindle, to permit disengagement of said members from the spiral grooves in said spool, and permit release of said spool.

v 3. A chuck, comp-rising a rotating spindle having diametrically opposite inc-lined recesses therein, arcuate holding, locking, driving members in said inclined recesses, a tool holding spool, spiral grooves diametrically opposite and of increasing depth from one end to the other in said spool, a relatively movable ring around said spindle, a. groove on the inner surface of said movable ring, said ring normally holdmg said members in the spiral grooves, and movement of said ring bringin g said groove on its inner surface into aline ment with said inclined recesses in the spindle to permit disengagement of said members from the spiral grooves in said spool and permit release of said spool.

4. A chuck, comprising a rotating spindle having inclined recesses therein, arcuate hold- 'ing, locking, driving",members in said inclined recesses, a tool holding spool, spiral grooves in said spool, a relatively movable ring around said spindle, a second ring affixed to said spindle, a groove on the inner surface of said movable ring, means normally holding said ringssepa-rated but permitting movement of said firstring toward said 1 second ring, movement of said first ring bringing said grooves on its inner surface into alinement with said inclined recesses in the spindle to permit disengagement of said members from the spiral grooves in said spool and permit release of said spool.

' 5. Av chuck, comprising a rotating spindle having inclined recesses-therein, arcuate hold ing, locking, 'driving'members in said in-- clined'recesses, a tool holding spool, spiral grooves in said spool, a relatively movable ring around said spindle, agroovein said ring, a second ring affixed to said spindle, a

spring d 'sposed between said rings and having its ends within said grooves in said rings, a groove on the inner surface of said movable ring, movement of said ring bringing said groove on its inner surface into alinement with said inclined recesses in the spindle to permit disengagement of said members from the spiral grooves in said spool and permit release of said "spool.

In testimony whereof, I have signed my name to this specification} ARTHUR" L; 'CURRIER. 

